You might as well compare with these Back Items so you can decide which Back Items you're gonna use for ninja Saga Pvp or in Hunting House for easier killing the boss or your opponent in ninja saga PvP
These Back Items might have better effect . Here we go :

• Chakra Ancestor Flame

  Reduce damage taken by 175. Has 5% chance to convert damage taken to HP positively.
• S53 Frostfire Soul

  Increases combustion chance by 15%. Has a 10% chance to freeze enemies who attacks the user for 1 turn. Frozen targets cannot act but takes 80% reduced damage.
• Vampire Cloak

  Increase healing power of scrolls by 100.
• Christmas Bag

  Reduce damage taken by 10.
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• White Metal Hammer
• Scroll: Messenger (3 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Puppet: Hakuki (3 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)
• Extra Large Presents Bag

  A large present bag, but nobody knows what it contains.
• Clear Cross

  Increase 3% purify chance. Each turn recover 150 HP and 150 CP.
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• S72 Hero Twin Axe

  Increase 12% Combustion Chance and recover 3% HP at the start of every turn. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Paper Windmill

  Additional 20 HP damage upon all attack.
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• Sakura Lantern

  Increase Combustion chance by 10%.(Minimum requirement of 1 Attribute Point in Fire to activate combustion effect). Has 10% chance to absorb 2% HP of enemy who attack you.
• Water Symbol Guitar
• Leopard Cat Tail
• S61 God Dragon Flag

  Increase critical rate by 6%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Clouds And Mist Raijinco
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%
• White Guitar
• Rose Cloak

  Restores 80 CP at the start of every turn. Converts 8% of damage taken into CP.
• GM Phone

  GM Phone
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Blue Pattern Skis
• S18 Evil Spirit Shield

  Reduce 14% damage taken.